I have been suffering from PF since 2008. I first got rid with a steroid injection under ultra sound - that lastest a year. When it came back I tried everything again only to have to get a 2nd injection, it lastest not so long - 3months.
I am now into my 3rd occurrance of the injury, its awful and I feel for you.
This time however I have stayed away from the deep massage- I found that it flared it up even more.
Icing - most of the time, made it more stiff and sore, I now find a combo of hot and cold soaks help it, always finishing on a hot soak.
Stretching is also helping this time but dont over stretch it as you can do some more damage.
As for the night splint, I have been wearing one since 2008, it keeps the pf strteched at night and can relieve your morning pain but still stretch before taking your first steps in the morn.
Apart from that it is a hard one to shift, I cant do much rest now for mine as I am heading for CW games in oct and need to train and race, but I am managing it so far into 2months of having it bk.
I spoke to someone who's advice on the next step wouyld be tendonopothy - blood is taken from you and the platelets are extracted and injected back into the pf, rest after this is advised, up to 10weeks.
Good luck and here to help if you need anymore advice.
k